package com.topvision.utils;

import java.io.*;
import java.nio.charset.Charset;
import java.util.Enumeration;  
import java.util.zip.ZipEntry;  
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;

/** 
 * 实现文件[夹]解压 
 * @author ljheee 
 * 
 */  
public class UnZipFile {  
  
    /** 
     * 解压到指定目录 
     * @param zipPath   
     * @param descDir  
     */  
    public static void unZipFiles(String zipPath, String descDir) throws IOException {  
        unZipFiles(new File(zipPath), descDir);  
    }  
  
    /** 
     * 解压文件到指定目录 
     * 解压后的文件名，和之前一致 
     * @param zipFile   待解压的zip文件 
     * @param descDir   指定目录 
     */  
    @SuppressWarnings("rawtypes")  
    public static void unZipFiles(File zipFile, String descDir) throws IOException {  
          
        ZipFile zip = new ZipFile(zipFile);//解决中文文件夹乱码
        String name = zip.getName().substring(zip.getName().lastIndexOf('\\')+1, zip.getName().lastIndexOf('.'));  
          
        File pathFile = new File(descDir+name);  
        if (!pathFile.exists()) {  
            pathFile.mkdirs();  
        }  
          
        for (Enumeration<? extends ZipEntry> entries = zip.entries(); entries.hasMoreElements();) {  
            ZipEntry entry = (ZipEntry) entries.nextElement();  
            String zipEntryName = entry.getName();  
            InputStream in = zip.getInputStream(entry);  
            String outPath = (descDir + name +"/"+ zipEntryName).replaceAll("\\*", "/");  
              
            // 判断路径是否存在,不存在则创建文件路径  
            File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));  
            if (!file.exists()) {  
                file.mkdirs();  
            }  
            // 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压  
            if (new File(outPath).isDirectory()) {  
                continue;  
            }  
            // 输出文件路径信息  
//          System.out.println(outPath);  
  
            FileOutputStream out = new FileOutputStream(outPath);  
            byte[] buf1 = new byte[1024];  
            int len;  
            while ((len = in.read(buf1)) > 0) {  
                out.write(buf1, 0, len);  
            }  
            in.close();  
            out.close();  
        }  
        System.out.println("******************解压完毕********************");  
        return;  
    }


    public static void decompress(File zipfile)throws IOException{
        int buffSize=204800;
        Charset charset=Charset.forName("GBK");
        //String exPath="/usr/local/facedata/";
        String exPath="D:\\dev\\";
        ZipFile zipFile=new ZipFile(zipfile);
        Enumeration<ZipEntry> enumeration=(Enumeration<ZipEntry>)zipFile.entries();
        while (enumeration.hasMoreElements()) {
            try {
                ZipEntry zipEntry=enumeration.nextElement();
                if(zipEntry.isDirectory()) {//文件夹
                    File file=new File(exPath+zipEntry.getName());
                    if (!file.exists()){
                        file.mkdir();
                    }
                }
                else {
                    File f = new File(exPath + zipEntry.getName());
                    FileOutputStream fileOutputStream = new FileOutputStream(f);
                    InputStream inputStream=zipFile.getInputStream(zipEntry);
                    int count=0,tinybuff=buffSize;
                    if(inputStream.available()<tinybuff){
                        tinybuff=inputStream.available();//读取流中可读取大小
                    }
                    byte[] datas=new byte[tinybuff];
                    while ((count=inputStream.read(datas,0,tinybuff))!=-1){//遇到文件结尾返回-1 否则返回实际的读数
                        fileOutputStream.write(datas,0,count);
                        if(inputStream.available()<tinybuff){
                            tinybuff=inputStream.available();
                        } else {tinybuff=buffSize;
                            datas=new byte[tinybuff];}
                    }
                    fileOutputStream.flush();//刷新缓冲
                    fileOutputStream.close();
                }
            }
            catch (Exception e){
                e.printStackTrace();
            }
        }
        zipFile.close();
    }


    public static void uzip(File zipfile,String path)throws IOException{
        ZipInputStream zis = new ZipInputStream(new BufferedInputStream(new FileInputStream(zipfile)));

        File fout = null;
        String parent = zipfile.getParent();
        ZipEntry entry;
        while((entry = zis.getNextEntry())!=null && !entry.isDirectory()){
            fout = new File(path, entry.getName().split("\\.")[0]+".jpg");
            if(!fout.exists()){
                (new File(fout.getParent())).mkdirs();
            }

            BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(fout));

            int b = -1;
            byte[] buffer = new byte[1024];
            while((b = zis.read(buffer))!= -1){
                bos.write(buffer, 0, b);
            }
            bos.close();
        }

        zis.close();
        try {
            UpdateFileNameUtils.renameFile(path);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }



}  